Valve-adjuster



F. H. SHARAR.

VALVE ADJUSTER.

AFRICA HON HLED DEC. 8| I9l9- Patented June 15, 1920.

JZESM/Wfl g .1: w ,7 L, .f l 4 d Win L m inflicting 25 FEED H. BHARAR, OF WILLIAMSPORT, PENNSYLVANIA.

VALVE-ADJUSTER.

Specification of Letters Patent.

Potent/ed June 15, 1920.

Application flied December 8, 1919. Serial No. 843,256.

To all whom it may concern:

Be it known that I, 'Fimn H. SIIARAR, a citizen of the United States, residing at Williamsport in the count of Lycoming and State of Pennsylvania, have invented a. new and useful Valve-Adjuster, of which the following is a specification.

This invention relates to new and useful improvements in tsppet valve construction, and more particularly to valves of this character employed in connection with internal combustion engines.

The primary object of the invention is to provide means for adjusting the valve rod for lengthening or shortening the Stl'OkQ thereof, thus insuring a proper sealing of the valve, st all times A further object of the invention is to provide efficient means for locking the valve stem in its various positions of adjustment, thus permitting exceedingly fine adjustment to be made, and maintained.

With the foregoing and other objects in view which will appear as the description roceeds, the invention resides in the cominetion and arrangement of parts and in the details of construction hereinafter described and claimed, it being undcrs )Oll that changes in the precise GillllOl'llTl'Nill) oithe inventiohherein disclosed, may he made within the scope of what is claimed, with out departing from the spirit of the invention.

Referring to the drawing? Figure 1 illustrates a fragmental sectional view through :1 valve casing. in which the valve, forming the subject matter of the present invention, operates;

Fig. 2 illustrates a detail View of the thimble forming a part of the invention;

-Fi 3 illustrates a modified form of the thim is;

Fig. 4 illustrates a sectional view taken on line 4-4 of Fig. 1.

Referring to the drawing in detail, the reference character 5 designates the valve cage which is provided with the usual guide bore 6, which accommodates the valve rod 7 forming the important feature of the pres ent invention.

This valve rod 7 has connection with the valveproper 8, and is disposed within the hon-3.6 of the cage 5, the lower end of said rod extending downwardly and terminating at a point directly above the bearin which forms a part of the cylinder to w ich the valve is applied, and as shown this hearing 9 is relatively large to accommodate the push rod 10, which is provided with o hore extending from one end thereof and terminating at predetermined oint adjacent the opposite end of the pus rod 10, the lower end of said push rod being bifurcated as at 11, to receive the roller 12, which roller 12 contacts with the usual cam 13 provided on. the cam shaft 14, whereby movement of the cum shaft 14 imparts a reciprocating imlllveumnt to the push rod 10, through the re. era

The horc formed in the push rod 10, is preferably threaded to receive the threaded extremity if; of the thimhle 16, which thimhie divided iutcim-vdiute its length by the wrench accommodating surfaces 16, the upper extremity of which thimble is shown us tapered and internally threaded, for purposes to he hereinafter more fully described.

Disposed within the side walls of the upper portion of the thimble 16, are longitudinal slots 17 which are disposed diametrically opposite each other to provide a lurality of sections 18, which sections, due to the slotted portions 17 possess a degree of resiliency to permit the same to more into and out of engagement with the threaded portion 1.9 of the adjusting screw 20.

A nut 21 operates on the upper tapered portion of the thimble 16 for moving the sections 18 into and out of engagement with the adjusting screw 20. This adjusting screw 20 is provider] with a knurled head 22, to permit the adjusting screw to be grasped by the four fingers of the operator to accomplish the rotation of the adjusting screw to enable the same to he moved ion 1- tudinally within the thimble 16 to cause t e adjusting screw to move toward and away from the thimhle, at the will of the operator.

Forming a part of the adjusting screw 20, is a flattened head 23, which is of a diameter to receive the lower extremity of the valve rod 7, which is held in close ongagement with the flattened portion '23 by means of the coiled spring 24, which encircles the valve rod 7, and has its lower extremity seated in the cup 25/ secured to the valve rod 7, the upper portion 0f;Wll10ll spring engages the wall 26, of the valve ca e.

mm the foregoing it will be seen that if the valve 8 becomes worn, or for other reasons does not properly seat, it is only necessary to loosen the nut 2L and rotate the adjusting screw to cause the same to move to len hen, or shorten the stroke of the valve r0 7, to the end that any wear at the valve seat, or between the cam and push rod may be compensated for.

The nut 21 is now rotated to cause the saline to move over the double surface of the upper end of the thimhle to cause the sections 18 to grasp the threaded portion 19 of the adjusting screw 20, whereupon the adjusting screw is looked in its position of ad ustment.

having thus described the what is claimed is 2-- 1. A tappet valve .oonstrimtion including, a push rod, :1 thimble supported within Lhe push rod, said thiinblehaving an upper terered portion, said tapered portion being internally and exteriorly threaded, an adjusting screw having a threaded shank e0- opereting with the. internal threads of the thimhle for securing the thimble and adjusting screw together, a nut operatin on the external threads of the thiinhle for locking the adjusting screw to invention,

the thimhlc, said adjusting H'IGW having a head providing a. seat for the valve rod, and means for holding the \alve rod to the adjusting screw.

2. A tappet valve construction iucludin a valve rod, a push rod havinga bore formed in the upper end thereof, a thimhle positioned within the bore, said thirnhle having a threaded and split u per end, an adjusting screw havin" a til-ended end eooperating with the threads of the thimble, for securing the thimble and adjusting screw together, a lockin nut operating on the split end of the thirn 1e for moving the walls thereof into engagement with the adjusting screw, said ad'usting screw providing a seat for one en of the valve rod, and means for normally holding the valve rod into engagement with the adjusting Screw.

In testimony that I claim the foregoing as my own, I have hereto aifixed my signature in the presence of two witnesses.

FRED H. SHARAR. Witnesses:

CHARLES BORMMANN, FRANK R. SHABnB. 

